Acid-etched Glass for Exterior Applications A Unique Way to Move Light!

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1 cid-etched Glass for Exterior pplications Unique Way to Move Light! University of Pennsylvania Philadelphia, P 6 mm custom pattern on position Because acid-etching is not a coating, its resistance properties to exterior conditions are essentially equivalent to unetched glass.

2 pplications - Sealed units - Exterior doors - Balustrades - Railings - Spandrel Benefits - Canopies - Skylights - Transportation shelters - triums - Bird friendly façades and more INRS - Laval, QC 6mm glass Satin on position with low-e on position 3 - Cleaning & maintenance similar to unetched glass - No significant impact on solar performance - Can be exposed to weather conditions on surface - Closed-pore surface that does not easily trap dirt & particles - Reduces glare significantly - dds a measure of privacy - Unique design - Depth in the glass - Brilliance in the surface - No impact on visible light transmittance - Harmonized spandrel and vision areas - Enhanced rendering of color on glass - Excellent to diffuse light - See data on Daylight Diffusion cid-etched Glass Properties To support its use in exterior applications in general and on surface # in particular, we have conducted several tests to assess resistance to wear, scratching, staining, and strength of the acid-etched glass surface. Refer to the chart below for the properties of our four acid-etched glass finishes, indicating equal or better performance compared to unetched glass. Test/Standard Resistance to Wear STM-C50 Resistance to Staining STM-C378 Scratch Hardness MOHs Satin 98 6 Satinlite Float Unit of Measure brasive Wear Index (Ix) Classification Out of possible 0 Interpretation Higher letter = better Test/Standard Modulous of Rupture STM-C58 Max load (pounds) Flexural Strength Modulous of Rupture (psi) 6mm Satin Tempered Etched Surface in Tension Unetched Surface in Tension mm Unetched Tempered Interpretation

3 Performance Data cid-etched glass has no significant impact on solar performance when combined with energy efficient glass in an insulated unit. In order to help with your calculations, please find below the performance data for all four finishes of 6mm (/4 ) glass in clear and. Barnard College New York, NY 6 mm glass on position with terracotta ceramic paint on position 2 Surface Finish Monolithic Unit Performance Visible Light 2 Total Solar Energy 2 UV 2 # Etched Glass Thickness Sides Substrate mm (in) 6mm (/4 ) 9% 2 9% 80% SC SHGC LSG mm (/4 ) 9% 82% Satin 6mm (/4 ) 89% 79% 64% Satinlite 6mm (/4 ) 8 80% 64% 5% mm (/4 ) 93% mm (/4 ) 92% 89% Satin 6mm (/4 ) Satinlite 6mm (/4 ) 89% 8 5% Notes - Figures may vary due to manufacturing tolerances. ll tabulated data is based on NFRC methodology using the LBNL s Window 5.2 software. 2- and reflectance values based on spectrophotometric measurements and energy distribution of solar radiation. 3- Shading coefficient is the ratio of the total amount of solar energy that passes through a glass relative to 3mm (/8 ) thick clear glass under the same design conditions. It includes both solar energy transmitted directly plus any absorbed solar energy re-radiated and converted. Lower shading coefficient values indicate better performance in reducing summer heat gain. Shading coefficient at outdoor air temperature of 32 C (89 F), outdoor air velocity of 3.4m/s (7.5mph), indoor air temperature of 24 C (75 F), indoor air velocity of 0m/s (0mph) and solar intensity of 783w/m 2 (248BTU/h/f 2 ). 4- Solar Heat Gain Coefficient (SHGC) represents the solar heat gain through the glass relative to the incident solar radiation. It is equal to 8 of the shading coefficient. 5- Light to Solar Gain (LSG) ratio is the ratio of visible light transmittance to solar heat gain coefficient. 6- Values are for indication purposes only and are subject to variation according to conditions of measurement, manufacture and/or application. 7- For Walker Textures TM Nuance product line, values indicated above may change depending on the pattern type.

4 Increased Daylight Diffusion, Less Energy Consumption Walker Textures TM and finishes are excellent light diffusers. They provide as much as 79% diffuse transmittance and as much as wide angle scattering commonly referred to as Haze. s a result, acid etched glass in exterior glazing units scatters natural light over a much larger area of the interior space thereby reducing the need for artificial light and decreasing energy consumption. Walker Glass Montreal, QC 2 mm glass Satin 2 faces on position and 2 The benefits are immense because countless studies prove that a well daylit environment results in enhanced human mood, behavior and performance while providing energy benefits. Light Diffusion Data The following data was obtained from tests performed in accordance with STM D003-3, Standard Test Method for Haze and Luminous of Transparent Plastics. This test method measures total luminous transmittance, diffuse transmittance and haze of selected Walker Textures TM acid etched glass finishes. These are key metrics to evaluate the ability of the glass to diffuse light into a space. Direct Light Diffuse & Haze STM D003-3 cid-etched finish Total Luminous 82.50% 88.44% Diffuse 75.09% 79.00% Haze 90.73% 89.30% ll glass test specimens were 6mm clear.

5 Walker Textures viprotek Bird Friendly Glass ccording to BC s standard, a bird-friendly building should have at least of exposed façade material from ground level to 40 feet that has been demonstrated in controlled experiments to deter 70% or more of bird collisions translating in a threat factor of 30 or less. Many different studies conducted by experts have shown that most birds will not fly into surfaces that have two inches or less of untreated horizontal space or four inches or less of untreated vertical space. This criteria is commonly referred to as the 2x4 rule. The experts also agree that uninterrupted patterns such as lines on the number surface are the most effective in preventing bird collisions. Bird Friendly Project - Cap Tourmente National Willdlife rea, St-Joachim, QC viprotek patterns 23 and 24 on position Threat Factors Patterns: 29.8 on position (70.2% of times birds will avoid collision) Full Surface: 5 on position (95% of times birds will avoid collision) 25 on position 2 (75% of times birds will avoid collision) Combining Different Glass Types cid-etched glass can be combined with many different types of glass technologies to create unique effects. Here are some examples: In insulated glass units acid-etched glass can be used in any of the 4 positions with a low-e coating on position 2 or 3, depending on the design and performance requirements. Creating a depth effect in the glass and removing glare at the same time can be achieved by combining acid-etched on position with paint on the #2 or #4 surface. The acid-etched mirror effect can be achieved when etching reflective glass. This will provide muted reflection and give that depth effect. cid-etched glass can be used in a laminate assembly for railing applications to obtain privacy and light flow. Wellesley College Wellesley, M 6mm clear glass Satin on position with black paint on position 4

6 LEED Green design not only makes a positive impact on public health and the environment, it can also reduce operating costs and enhance building spaces and surroundings. Walker Glass Co. Ltd. can help users of our products, and more specifically building owners get LEED points. Daylight contribution under the Indoor Environmental Quality category Innovation in Design category USGBC - Pilot Credit 55: Bird Collision Deterrence - See the viprotek section Sampling There are an unlimited number of potential combinations when using acid-etched glass in exterior applications (low-e, ceramic frit, digital printing and more). The best way to obtain samples for what you are looking for is to communicate with your local architectural representative who will help you throughout the design development process. Walker will provide standard size samples ranging from 4 x 4 to 24 x 36. If required, full size mock-ups can be made available. We can also provide Insulated Glass Unit samples. University of Iowa Heath Care Iowa City, I 6 mm clear glass on position 3 with a low-e on position 2 Specifications 3 part specifications, comprising several critical elements, are available for Walker Textures products. Gloss range - To ensure quality and consistency of the finish. Glass Properties - To set requirements on resistance to wear, scratch and stain. Glass Performance - To calculate the performance of the double glazed unit. Cleaning - To include post installation cleaning and maintenance instructions. To download Walker Textures 3 part specifications please go to: Limited Warranty on Surface Degradation Walker warrants, for a period of 0 years, that the etched surface will not degrade, provided that the surface is not subjected to any conditions that would otherwise lead to premature degradation of unetched float glass. For the complete terms and conditions of the Walker Textures TM warranty, please contact our architectural experts. PUBL-VEM-035 (405) Walker Glass Co. Ltd., 955 Ray Lawson Blvd., Montreal, QC, HJ L5 Canada Phone: or Fax: textures@walkerglass.com Web Site: